Chilled-water AHUs
Connected to a chiller plant. The standard choice for larger buildings, with capacity controlled by a valve on the coil.
Euroklimat air handling units
Air handling units
Clean, conditioned air for offices, hospitals, factories and malls. Euroklimat chilled-water and DX air handling units and fresh air units, selected and installed by MA Engineering.
- Chilled water or DX
- Fresh air units
- Hygienic construction
- Euroklimat, Italy · since 1963
The basics
What is an air handling unit?
An air handling unit (AHU) is a large cabinet that conditions air and pushes it through a building’s ductwork. Inside, filters clean the air, coils cool or heat it, and fans move it to the rooms. The AHU can also bring in fresh outdoor air and control humidity.
AHUs are the heart of central air conditioning in larger spaces such as malls, halls, hospitals, factories and offices, usually working with chilled water from a chiller plant.
Each AHU is built from sections, so it can be configured for the job: finer filtration for a hospital, heat recovery for a fresh-air system, or extra dehumidification for humid weather.
How it works
Section by section: how air is treated
Air passes through a series of sections, each doing one job.
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01
Intake and mixing
Return air from the rooms mixes with fresh outdoor air. Dampers set the proportion of each.
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02
Filtration
Filter banks remove dust, pollen and fine particles. Filters are graded under ISO 16890 (ePM10, ePM2.5, ePM1); critical areas add HEPA filters graded under EN 1822.
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03
Cooling and heating coils
A chilled-water or DX coil cools and dehumidifies the air, and a heating coil warms it in winter. Condensate runs off to a sloped drain pan.
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04
Supply fan
Plug fans or fan arrays push the treated air into the ducts. Variable-speed fans match airflow to demand and save energy.
Fresh air handling units (FAHUs) treat 100% outdoor air. In humid weather they do most of a building’s dehumidification, keeping rooms comfortable and free of damp.
Unit types
The right unit for each job
Euroklimat builds AHUs for comfort, healthcare and industrial applications.
DX AHUs
Have their own refrigerant coil and outdoor condensing unit, so no chiller is needed. Suit standalone areas and smaller buildings.
Fresh air units (FAHUs)
Handle 100% outdoor air for ventilation, often with a heat-recovery wheel or plate that pre-cools incoming air using exhaust air.
Hygienic AHUs
Smooth, cleanable inner surfaces, well-sealed casings and finer filtration for hospitals, laboratories and pharmaceutical plants.
Process AHUs
Close control of temperature and humidity for production areas and clean rooms.
Configured to fit
Built from sections to suit plant rooms, rooftops and tight access routes.
Is it right for you?
When you need an AHU
A strong fit when…
- You are conditioning large open spaces: malls, halls, auditoriums, mosques and factories
- You need controlled fresh air and filtration, as in hospitals, laboratories and offices
- Humidity control matters, for example in pharmaceutical, food and electronics production
- You have, or plan, a chilled-water plant
- You want noisy equipment kept in plant rooms, away from occupied spaces
Consider another system when…
- Many small rooms each need their own control: VRF or fan coil units suit this better
- There is no space for ducts or a plant room
- The building is small and has no chilled-water plant
Alternatives we supply:
Why Euroklimat
Built for clean, efficient air
A European brand founded in Milan in 1963, manufacturing in Italy and China. Euroklimat offers a complete HVAC range under one roof and is one of the fastest-growing HVAC brands in Pakistan.
- Founded 1963
- Milan
- Origins: Italy & China
- 2
- ISO · CE · ASME · CNAS
- AHRI · Eurovent
Euroklimat AHU range
- Chilled water AHUs
- DX AHUs
- Fresh air handling units (FAHUs)
- Chilled water or DX coils
- Fresh air & process options
- Hygienic construction
Track record
AHU projects
Projects on our list that include air handling units, largest first.
3,000 TR
2,500 TR
Hattar · Industrial & Pharma
Coronet Foods (Pvt) Ltd
Supply of HVAC Equipment
1,800 TR
Peshawar · Commercial & Hospitality
Pearl Continental Hotel
Complete MEP Works
- Chillers
- Cooling towers
- AHUs
- FCUs
- BMS
- Electrical
- Fire fighting
1,200 TR
Karachi Region · Commercial & Hospitality
Metro Pakistan (Pvt) Ltd
Complete HVAC Works
- Chillers
- Cooling towers
- AHUs
- FCUs
- BMS
- MS piping & ducting
1,200 TR
Lahore · Commercial & Hospitality
Metro Pakistan (Pvt) Ltd
Complete HVAC Works
- Chillers
- Cooling towers
- AHUs
- FCUs
- BMS
- MS piping & ducting
900 TR
Industrial & Pharma
Al Raaziq International (Pvt) Ltd
Complete MEP Works
- Chillers
- Cooling towers
- AHUs
- FCUs
Planning a project
What to consider before you buy
An AHU runs every hour the building is occupied. These choices set its air quality and its running cost.
Airflow and fresh-air rates
Size the unit from the cooling load and the ventilation each space needs under standards such as ASHRAE 62.1. Too little fresh air makes rooms stuffy; too much wastes energy.
Filtration level
Match filters to the space: offices need less than hospitals. ASHRAE 170 requires at least MERV 16 filtration for operating rooms, and HEPA filters are common there.
Humidity and condensate
In humid conditions, such as in Karachi or during the monsoon, coils must be sized for dehumidification as well as temperature. Drain pans must slope and drain fully to stop bacterial growth.
Fan energy
Efficient fans, low-resistance filters and coils, and variable-speed control cut running costs, because fans run whenever the building is in use.
Access for maintenance
Leave space to open doors, change filters and pull coils. Pressure gauges across each filter bank show when filters need changing.
Controls
Temperature, humidity and CO₂ sensors linked to the BMS let the AHU supply only the air that is needed.
FAQ
Air handling units: common questions
Can’t find your answer? Ask our engineers.
What is an air handling unit?
A large unit that filters, cools or heats, and circulates air through a building’s ducts. It can also bring in fresh outdoor air and control humidity.
What is the difference between an AHU and an FCU?
An AHU is a large central unit that treats air, often including fresh air, and sends it through ducts to many spaces. A fan coil unit (FCU) is a small unit that recirculates and cools the air of one room. Many buildings use both: a fresh-air unit for ventilation and FCUs in each room.
What is the difference between an AHU and an FAHU?
A standard AHU mixes return air from the rooms with some fresh air. A fresh air handling unit (FAHU) treats 100% outdoor air, which means it handles a much larger dehumidification load and often includes heat recovery.
Chilled-water or DX AHU: which should I choose?
If the building has, or will have, a chiller plant, chilled-water AHUs are usually the better choice. DX AHUs have their own refrigeration and suit standalone areas or buildings without a chiller plant.
What filters does an AHU need?
It depends on the space. General filters are rated under ISO 16890 (for example ePM10, ePM2.5 and ePM1) or MERV in US standards. Hospitals and clean rooms add HEPA filters rated under EN 1822, such as H13 or H14.
How often should AHU filters be changed?
When the pressure drop across them reaches the limit set by the filter maker, rather than on a fixed calendar. A pressure gauge on each filter bank shows this. In dusty conditions it can be much more often than in clean areas.
How can an AHU save energy?
Variable-speed fans, heat recovery on fresh air, low-resistance filters and coils, and control from CO₂ and occupancy sensors all reduce energy use.
Do you install the ductwork too?
Yes. We carry out complete HVAC works, including ducting, piping, installation, testing and commissioning.
Get a selection
Need clean, conditioned air?
Share your drawings, space types and fresh-air requirements. Our engineers will select Euroklimat AHUs with the right coils, fans and filters for your building.